In this article we will see how we can check if the signals are blocked or not of the spin box, blocking signals means the connected methods with the spin box will not receive the signals for example when we add action to it when its value changes that action will not work. Signals emitted while being blocked are not buffered. In order to block signals we use blockSignals method.
In order to do this we use signalsBlocked method.
Syntax : spin_box.signalsBlocked()
Argument : It takes no argument
Return : It returns None
Below is the implementation
# importing libraries from PyQt5.QtWidgets import * from PyQt5 import QtCore, QtGui from PyQt5.QtGui import * from PyQt5.QtCore import * import sys class Window(QMainWindow): def __init__(self): super().__init__() # setting title self.setWindowTitle("Python ") # setting geometry self.setGeometry(100, 100, 600, 400) # calling method self.UiComponents() # showing all the widgets self.show() # method for widgets def UiComponents(self): # creating spin box self.spin = QSpinBox(self) # setting geometry to spin box self.spin.setGeometry(100, 100, 250, 40) # setting prefix to spin self.spin.setPrefix("Prefix ") # setting suffix to spin self.spin.setSuffix(" Suffix") # blocking signals of the spin box self.spin.blockSignals(True) # creating a label self.label = QLabel("Label ", self) # setting geometry to the label self.label.setGeometry(100, 200, 300, 30) # checking if signals are blocked or not check = self.spin.signalsBlocked() # setting text to the label self.label.setText("Signals Blocked ? : " + str(check)) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
